What are non-stoichiometry defects in crystals ? Explain.

What is the non-stoichiometry defect in the crystals ?

What is a stoichiometric defect in crystals?

What are non-stoichiometric defects in an ionic crystal? Explain how metal excess defects occur in an ionic crystal.

What is point defect in crystals ?

What are interstitial defect in a crystal?

Explain the Schottky defects in crystals.